package ooday01;
//学生类
public class Student {
     //成员变量
    String name;
    int age;
    String address;
    ///方法
    void study(){
        System.out.println(name+"在学习...");
    }
    void sayHi(){
        System.out.println("大家好，我叫“+name+“，今年"+age+"岁了，家住"+address);
    }
}